Operation Deep Freeze, a scientific expedition to Antarctica discovers unusual tree specimens. When specimens are shipped out for further study, the trees are accidentally introduced to a south seas Navy base, soon revealing themselves to be killer, acid-secreting monsters that live by night.

A nightmare comes alive...terrifying acid bleeding monsters multiply by the millions...ready to cremate the human race!!

Beware of the Night Crawlers...their clutches will disintegrate you!

Movie Quote(s):

CPO Fred Twining: [trying to catch one of the small creatures with two dinner plates] What if it jumps? Bob Spaulding: Jump higher.

Nora Hall: If that tree was planted at the warm springs, how did it get here? Dr. Arthur Beecham: In plain English, it walked here.

Nora Hall: It's hard to imagine. Carnivorous trees that move on their own roots. Dr. Arthur Beecham: Not carnivorous. Omnivorous. All-devouring. Our bogey has no class at all. He'll eat anything, even other trees. Bob Spaulding: What would create a monster like that? Dr. Arthur Beecham: Antarctica. A place where the nights are six months long.

Movie Trivia:

Director Michael A. Hoey and producer Jack Broder had major disagreements during shooting. Broder changed the title from "Night Crawlers" - the title of the book upon which the script was based - to its current title, which Hoey detested. Broder also had story ideas Hoey disagreed with, and when the "tree stump monsters" arrived, Hoey thought they were ridiculous and refused to shoot them. Broder called in Arthur C. Pierce, who was working on another movie Broder was producing, and had him shoot additional scenes to add the story elements Broder wanted. He also had Jon Hall, who had created the "tree stump monsters", shoot the scenes with them that Hoey refused to do.

Shot in ten days.

After the movie had completed shooting a producer added the scenes of the island being destroyed by military bombers. There also were close-up shots of the creatures showing off how low budget the effects were.